vitamin

Niacin supplements

Half of the 12,413 niacin supplements in the NIH label database that print an amount list 20 mg or less per serving; the middle half list 13.2 mg to 48 mg, and 35% of the 12,334 with a plausible amount give more than the adult upper limit at the most servings their labels direct (DSLD version 9.4.0, January 2026). The 295 products whose only supplement ingredient is niacin list a median of 500 mg, and 98% of them give more than the upper limit.

How much niacin do supplements contain?

The median product lists 20 mg per serving. One in ten lists 5 mg or less, one in ten 100 mg or more. The amount printed most often is 20 mg (2,521 products).

How do the amounts compare with the Daily Value and the upper limit?

The FDA Daily Value for niacin is 16 mg (adults and children 4 and older). The median product gives 125% of it per serving; the 90th percentile 625%.

The adult Tolerable Upper Intake Level is 35 mg a day (synthetic forms from supplements and fortified foods). At the most servings their labels direct, 4,377 of the 12,334 products with a plausible amount (35.5%) give more than that from the supplement alone (what counts as plausible).

The upper limit is for total intake from food, water and supplements unless stated, and does not apply under medical supervision. A label amount is what the maker printed. This is data, not advice: the NIH ODS fact sheets explain what each nutrient does.

Which products list the most niacin?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

• NiaPlexKaruna1,000 mg
• Hb HDL BenefitPRN Physician Recommended Nutriceuticals1,000 mg
• Vitamin B3 Niacin 1000 mgLife Extension1,000 mg
• Niacinamide 1,000 mgNature's Life1,000 mg
• Memory BoostHighland Laboratories1,000 mg
• Timed Release Niacin 100 mgRugby1,000 mg
• First Step VitaminsVitalBulk1,000 mg
• Niacin 1000 mgVitalBulk1,000 mg

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 26 mg; those entered in 2025, 20 mg.

In which products and brands?

Brands listing it most: Douglas Laboratories (253), Nature's Way (232), Nature's Plus (208), Bronson (96), Cellucor (92), Country Life (86), NOW (81), ProCaps Laboratories (79), Metagenics (78), Rainbow Light (75).

Every product listing niacin

12,779 products, A to Z by name (page 162 of 256), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Non-Carbonated Peach Mango Green TeaCelsius20 mg
• Non-Carbonated Raspberry Acai Green TeaCelsius20 mg
• Non-Carbonated Watermelon BerryCelsius20 mg
• Non-Flush Niacin 500 mgNature's Harmony500 mg
• Non-Yeast GTF (Glucose Tolerance Factor)Ecological Formulas15 mg
• Nootropic Brain BoostBioSchwartz50 mg
• Nootropic Brain BoosterVimerson Health12.5 mg
• Nootropic Mood FormulaDrFormulas20 mg
• Nootropic StimulantAddrena1.5 mg
• NootrostimAddrena1.5 mg
• NOS Blast Creatine Nitro SolutionPrecision Engineered25 mg
• NOS Blast Creatine Nitro Solution Blue RaspberryPrecision Engineered75 mg
• NOS Blast Creatine Nitro Solution Extreme OrangePrecision Engineered25 mg
• NOS Blast FactorPrecision Engineered · off the market20 mg
• NOS Blast Factor Pre & Post Workout FormulaPrecision Engineered20 mg
• Not Just JointsXtendlife · off the market34.4 mg
• NowReliv20 mg
• Now Creamy Vanilla FlavorReliv20 mg
• Now For Kids ChocolateReliv10 mg
• Now For Kids Chocolate FlavorReliv10 mg
• Now For Kids VanillaReliv10 mg
• Now Vanilla Cream FlavorReliv20 mg
• Now Whey ProteinReliv20 mg
• Now with Luna RichReliv20 mg
• Now with WheyReliv20 mg
• Nr 1000Renue By Science1,000 mg
• NR Essentials Multivitamin For WomenNative Remedies15 mg
• NR LongevityPure Encapsulations300 mg
• nr+Mindbodygreen · off the market200 mg
• Nr6Xtendlife300 mg
• NSAID Rx DepletionMartin Avenue Pharmacy15 mg
• NSAID SupportThe Professional Series15 mg
• NSP 1 Super Hy-Vites Extra StrengthGreat Earth Vitamins · off the market75 mg
• NSP 1 Super Hy-Vites Ultra StrengthGreat Earth Vitamins · off the market110 mg
• NTFactor Advanced Physicians FormulaAllergy Research Group99 mg
• NTFactor Advanced Physicians FormulaNutriCology99 mg
• NTFactor Advanced Physicians Formula B-Vitamin PlusNutriCology · off the market99 mg
• NTFactor Advanced Physicians Formula B-Vitamins PlusAllergy Research Group · off the market99 mg
• NTFactor Advanced Physicians Formula NTFactor B-Vitamins PlusAllergy Research Group · off the market99 mg
• NTFactor Healthy AgingNutriCology · off the market20 mg
• NTFactor Healthy AgingAllergy Research Group20 mg
• NTFactor Healthy Aging Mitochondrial FuelNutriCology20 mg
• Nu EssenceBronson Laboratories18 mg
• Nu-Thera Multivitamin with P5PKirkman20 mg
• Nu-Thera W/O Vitamins A & DKirkman · off the market20 mg
• Nu-Thera With 50 mg P-5-PKirkman · off the market20 mg
• Nu-Thera without Vitamins A & DKirkman20 mg
• Nuclear X Citrus SurgeMET-Rx150 mg
• Nuclear X Radioactive PunchMET-Rx150 mg
• Nuclear X Sour AppleMET-Rx · off the market100 mg

Where next?

• Check an amount of niacin
• Labels above the upper limit
• All ingredients